30 of the fastest declining occupations

Telemarketers

Number employed in 2006: 395,000Percent change in 2016: -9.9 percentEducation/training: Short-term on-the-job training and good phone and sales skills are all that are typically required.2006 median salary: $24,190Job outlook: Decline will come as a result of more people opting out of receiving sales calls from salespersons, and as call-blocking technology improves.